Low
S.28 on Vaillant ecoTEC plus Aquaplus

Your boiler is perfectly fine; this is just a normal temporary pause where the system is waiting for the hot water storage tank to heat up before it lets the central heating turn back on.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Monitor it

This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.

Technical description

Anti cycling mode (store charging)

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Related fault codes

S.27View →S.30View →

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